CMMVC8797E Unable to change mdisk property while being part of an MDisk Group with an encryption key.
Explanation
The MDisk Group and/or one of its child pools has an encryption
key that it is using for the MDisk. This can not be changed while the MDisk contains
customer data.
User response
You need to remove the MDisk from the MDisk Group,
apply the change in property, and then add back to the MDisk Group.